Oval top-tube and one-piece seat stay combination



FIG. 1 is a right side elevational view of an oval top-tube and one-piece seat stay combination, it being understood that the broken lines are for illustrative purposes only, and form no part of the claimed design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof. 

The ornamental design for an oval top-tube and one-piece seat stay combination, as shown and described. 